Basic information on how to post documents:

UPLOADING FILES

On the left side of the page (above SEARCH) there is a tag named Manage Wiki. Click it and then from the Content subfolder, click Files. A new page will appear. Click Upload files and then browse in your computer to upload the desired file. The file will then become part of this project page archive. Make sure the document you are uploading contains your name in its title (for easier identification)

POSTING FILES ON YOUR GROUP PAGE

On the left side of the page (below Home) there is a tag group+number. Click on the group you are part of. A page will open, with the message "Here is what we did."
In the right side corner there is button EDIT. Click it and an Editor toolbar will be opened on top of the page. From the Editor toolbar, click File. A list will appear of all the documents uploaded on the project page. Click on the document you have uploaded and which you want to post on your page. Do not forget to click Save when you are done.

You can also write a text on your page, post an image or a video.